Sir Jonathan Guy Jones KCB KC (born 21 May 1962) is a British lawyer, appointed in March 2014 and serving until his resignation on 8 September 2020 as HM Procurator General, Treasury Solicitor and Head of the Government Legal Service, and so the Permanent Secretary of the Government Legal Department (until April 2015, named the Treasury Solicitor's Department).

[1][4] He then was called to the Bar in 1985 and served as a legal advisor to the Motor Agents Association for three years before joining the government in the Office of Fair Trading in 1989.

In 2009 Jones became the Deputy Treasury Solicitor, and after three years moved to the Home Office as their Director-General for Legal Affairs from 2012 until 2014.

[11] After observing a 3-month pause in accordance with advice from the Advisory Committee on Business Appointments, Jones took up a position as a senior consultant with the international law firm Linklaters from 15 March 2021.

[12] Jones is also an Honorary Professor at Durham Law School,[13][14] a Senior Fellow of the Institute for Government,[15] an Honorary Senior Fellow of the Bingham Centre for the Rule of Law,[16] a Master of the Bench of Middle Temple,[17] and a lay canon and member of the Chapter of Ely Cathedral.